Kyasanur forest disease KFD and Omsk haemorrhagic fever OHF

KFD is named after the forest in Karnataka, South India where an epidemic was first identified in 1983. A very similar disease, OHF, is restricted to western Siberia. The organisms and clinical features are described with the other arbovirus haemorrhagic fevers in Section 15.2.

Transmission is by Haemaphysalis spini-gera, with a reservoir in rodents and monkeys in KFD and Dermacentor reticula-tus and D. marginatus in OHF. The muskrat is the reservoir, so hunters are the main victims from which they can also acquire infection directly.

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